Carbureter for explosive-engines.



PATENTBD PEB. 28, 1905'.

B. SHIPMAN. GARBURETBR FOR EXPLOSIVE ENGINES.

APPLICATION FILED JAN. 8, 1904.

llJNITE'D STATEs ittatmented February" 2d, Matita attratti CARBURETERFOFi Explmwllvllirlilhttttlhl SPECIFIGATION forming prt 0f LettersPatent 783,92, dated February Effi, 1905.

' Application filed JanuaryS, 1904. Serial No. 183,21.

To all whom it may oon/cern: Be it known that I, RALPH SHIPMAN, aci-tizen of the United States, residing' at Sunbury,

Figure 1 is a side view of the carbureter, the feed-pipe for thereservoir being shown in central section. Fig. 2 is an end View of thesame looking from the right in Fig. Il, the cylinder of thevalve-retarding devicebe ing shown partly in section. Fig. 3 is a sideview, the reservoir being shown in central vertical section with itscover removed and the lioat which controls the admission of liquid fuelto the reservoir being shown in dotted lines. Fig. Il; is a top planview of the carbureter with the cover of the reservoir re moved. Fig.54s a view showing the mixing chamber in longitudinal vertical section,and

Fig. 6 is an end view of the mixing-chamber y looking from the left inFigs. 1 and 3.

Referring to the drawings, 1 indicates a reservoir having a removabletop 2. Any suitable liquid fuel is supplied to the reservoir by afeed-pipe 3, communicating through an opening 3 with the reservoir, andthe supply of liquid in the reservoir is maintained at a practicallyconstant level by means of a valve Ll,.o},)erated by a float 5 throughthe medium of a lever 6, which is pivotally connected to the float andto the needle-valve 4 and fulcrumed upon a fixed pivot-pin 7 betweenthev oat and the needle-valve. The Afloat is centered. within thereservoir by a rod 5, extend ing downward from the center of the floatinto a socket 8, formed in a projection 8, extending downward from thebottom of the reservoir, andby a vertical guide-groove 9 within 5o thereservoir which engages and guides the free-end of the lever G. Theupward movement of the-float causes the needlewalve to close, and thedownward movement ot' the float causes said valve to open, thuscontrolling the 5 5 supply of liquid to the reservoir and maintainingthe liquid at a m'actically constant level in the reservoin Thereservoir is in communication with the atn'iosphere through a smallvent-opening 10, formed in the upper 6o part of the reservoir-casing,which prevents the formation of a partial vacuum in the roservoir whenthe liquid is withdrawn therefrom.

Adjacent to the reservoir 1 `is arranged a mixing-chamber 11, consistingof a tubular casing having a coupling 1ln at one end for attachment to apipe leading to the engine and having its opposite end 1l" open, so asto admit air freely to the mining-chambe1z With in the casing of themixing-chamber is ar 7o ranged a valve 1S?, which is secured to a shaftor pin 13, arranged transversely in the upper portion oi the casing nearits open end. This valve extends longitudinally inthe casing, and

its free end normally restsupon a stop 14 near 7 5 the bottom of thechamber adjacent to the coupling` 11, which stop prevents the completeclosure of the valve. The stop 1din this instance is the end of the tubethrough which vapor is drawn into the mixing-cl'iam- 30 ber in themanner hereinafter described. The valve is normally held against thestop by a spring 15, one end of which passes through the lower wall ofthe mixingchamber and is connected to the valve, while its opposite endis connected to an adjusting-screw 15, mounted in a bracket 1.6, Whichisattached to the reservoir. The valve-restricts the flow of air throughthe mixing-chamber and directs the air past the opening in theiQQ pipelll, through which the liquid spray is drawn into the mixing-chamben lhevalve opens to a greater or less extent, according to the suction of theengine, and the quantity of air is accordingly varied ftnysuitable 'form95 or arrangement of spring may be substituted for that shown 1n thedrawings.

llt is desirable to permit the valve 12 to open or passage-way 21 becontrolled.

rather freely and to retard its closing movementin order to avoid thehammering ot' the valve against its stop. For this purpose a lever 17 issecu red to the Arod 13, upon which the valve is mounted, and to thefree end ot' this lever is pivotally connected a rod 18, having thereona plunger 19, Fig. 2, which operates in a pump cylinder or barrel 20. Apipe leads from the interior of the reservoir tothe bottom of thecylinder, and a check-valve 22 is arranged within the cylinder toprevent the return of iuid through said pipe 21. 'Another pipe orpassage-way, 23, extends from the interior of the reservoir to theinterior of the pump-barrel at a point abovethe entrance ot' the pipe21. Needlevalves 24 and 25 are arranged within the mouths of the pipes21 and respectively, in the'reservoir, so that the flow of liquidthrough the pipes may be regulated and lthe retarding action on thethroat-valve 12 may 1t will be evident that when the plunger 19 is movedupward by the throatvalve 12 liquid will be drawn int the pumpbarrelthrough the pipe 21, and when the plunger descends' this liquid will beforced out through the pipeL 23. By adjusting the needlevalve 25 thereturn of liquid to the reservoir may be regulated so as to retard thedownward movement of the plunger.

The gasolene or other carbureting liquid is conductedlfrom the reservoirto the mixinglchamber Athrough the open-ing 26, passageway 27, andthrough pipe or passage-way 14, leading from the passage-way 27 at apoint a little above the level of the liquid into the mixing-chamberbelow thevalve l2. The

flow of liquid into the chamber is controlled by the needle-valve 28 inthe passage-way 14.

1n order 'to obviate the necessity of making the plunger tit air-tightwithin the cylinder and tol insure eiiicient lubrication and uniformworking of ithe plunger, liquid/is supplied Jfrom the reservoir to thepump or dash-pot cylinder through an opening 29 above the plunger.

The operation ofthe device is as Jfollows: The liquid is supplied to thereservoir and maintained at a constant level therein by the action ofthefloat and valve 4. r1`he needle-valve 28 is opened to permit alimited low of the liquid to the mixing-chamber 11. At eachsuctionst-roke of the engine air is drawn through chamber 11 under valve12 and draws the liquid by suction frominlet 1a, and an intimate mixtureis produced. he throat-valve 12, which is acted upon by the spring' 15,restricts the flow of air, and the valve is opened only I when there isa demand for air made by the vWhen the valve is moved upward engine.

lby inrushing air, 1t raises the plunger in the cylinder, which causesliquid to iiow into the lower part of the cylinder through passageway21. Upon the return ofthe valve' and plunger the check-valve preventsthe liquid from flowing through passage 21, and it escapes t'rom thecylinder through passage 23 to the reservoir, and on account of the slowreturn of the liquid the downward movement of the plunger is retarded,thus preventing any sudden closure of the valve 12 when there is nodemand for air. The supply of the mixture to the engine is regulated bycontrollingcock 31, which is usually connected to a suitable leverconvenient to the operator.

Having described my invention, .what I claim, and desire to secure byLetters Patent,

1. In an atomizer for an internal-combustion engine, a normally openair-passage, a fuelsupply nozzle projecting into said passage, aswinging damper normally operating to partially close that portion ofthe air-passage at said nozzle but leaving said nozzle open at valltimes said damper being adapted to move and increase the size of saidpassage proportional to an increased volume of air traversing saidpassage.

2. In an'atcmizer for internal-combustion engines, an air-passage, afuel-supply nozzle projecting into said passage, a swinging damper, thefree end of the same moving toward and away from said nozzle andnormally operating to partiallyv close the air-passage at said nozzlebut leaving the latter open at all times, said damper being movable toincrease the size of the passage directly adjacent to the nozzleproportionally to an increased volume of air traversing said passage.

3; In a carbureter for explosive-engines, a mixing-chamber comprising atubular casing having one end adapted for connection'to an engine and anair-admission opening at its opposite end, a hinged valve Within thecasing, normally restricting the passage of air through the casing andadapted to open by atmospheric pressure, and means for admittingliquidfuel into said casinga't a point adjacentto the free end of saidvalve and between said free end and the air-admission opening.

L1. YIn a carbureter for explosive-engines, the combination with a.mixing-chamber, having an air-inlet opening, a reservoir for liquid fueladjacent to said chamber and a passage-way connecting said reservoir andchamber, of a valve normally restricting `the flow of air to saidchamber and adapted to open by atmospheric pressure, and means forretar'ding the return or closing movement of said valve comprising areciprocating pump having its plunger connected to said valve, thecylinder of said pump having inlet and outlet openings communicatingwith said reservoir, and means for regulating the iow of liquid throughsaid openings.'

5. in acarbureter foreXplosive-engines, the combination with amixing-chamber having an air-inlet opening, a reservoir for liquid fuelIOO IOS

IIO

adjacent to said chamber and a passage-Way connecting said reservoir andchamber, of a valve normally restricting the Elow oi an' to said chamberand adapted to open by atmospheric pressure, and means for retarding thereturn or closing movement oi: said valve comprising a reciprocatingpump, having its plunger connected to said valve, said pump beingarranged to 'pump liquid into and out oi' said reservoir.

d lln a carburetor 'for explosive-engines, the combination with amixing-chamber having an air-inlet openiing, a reservoir for liquid fuel7. ln a carbureter for explosive-engines, a

mixing-chamber comprising a tubular casing having one end adapted forconnection to an engine and an opening at its opposite end for theadmission of air, a valve pivoted at one end Within the casing andextending longi tudinally therein and adapted to open by atmosphericpressure, and means for admitting liquid fuel into said casing between.the free end of said valve and the adjacent )vali of the' casing. i

8. ln a carburetor forsexplosive-engines, a mixing-chamber comprisingl atubular casing having one end adapted i'or connection to an engine andan opening at its opposite end 'for the admission of air, a valvepivoted at one end within the casing and extending longitudinallytherein andadapted to `open by at* mospheric pressures stop arranged toprevent the complete closure of said valve, and means for admittingliquid fuel into said casing between the :tree end of said valve and thead jacent Wall oi the casing.

9a In a carbureter for, explosive-engines, a mixing-chamber comprising atubular casing having one end adapted for connection to an engine and anopening at its opposite end for the admission ot' air, a valve pivotedat one end within the casing and extending longitudinally therein andIadapted to open by atmospheric pressure, means for admitting liquid iuelinto saidV easing betiveen the free end of said valve and the adjacentwall of the casing and means for retarding the closing movement of saidvalve. i

lO.A Inv a carburetor for explosive-engines, a mixing-chamber comprisinga tubular casing havingene end adapted for connection to an engine andan opening at its opposite end for the admission of air, a valve pivotedat one end within the casing and extending longitudinally therein'andadapted to open by atmospherie pressure, a stop arranged toprevent thecomplete closure oi said valve', means for admitting liquid i'ucl intosaid casing between the free end ot' said valve and the adjacent wall ofthe casing, and means for retarding the closing movement of said valve.

l1. ln a carbureter for explosive-engines, the combination with amixing-chamber having an airinlet opening, a reservoir for liquid iueladjacent to said chamber and a, passageway connecting said reservoir andchamber, of a valve normally restricting the flow of air to said chamberand adapted to open by at mospherie pressure, and means for retardingthe return or closing movement of said valve comprising a reciprocating"pump having its plunger operatively connected to said valve, the'cylinder oi' said pump having inlet and outlet openings communicatingwith said reservoir, :luebeck-valve controlling said inletopening to thepump-cylinder and a valve arranged to regulate the passage oi fluidthrough said outlet-opening of the pump-cylinder.

.12. In a carbureter for explosiveengines, the combination with akreservoir for liquid fuel andI means for maintaining the liquid thereinata practically constant level,ol ahorizontally-arranged mixing-chamberadjacent to said reservoir, a vertically-adjustable valve ar' rangedlongitudinally in said chamber, means for admitting liquid fuel intosaid chamber q between the free end of said valve and the adjacent wallof the cham ber.

i3. ln a carbureter for explosive-engines, the combination oi' amixingchamber, a spring-pressed valve arranged to restrict the ilovv ofair through said chamber and to open by atmospheric pressure, areservoir for liquid fuel adjacent to said mixingmhamber, `and meansJror retarding the closing movement of said valve comprising areciprocating pump having its plunger operatively connected to saidvalve, the barrel of said pump having an opening above the plunger'communicating with said reservoir and having inlet and outlet openingsbeloviI the plunger also communi+ eating with said reservoir.

le. ln an atomizer 'for au internal-combustion engine, a normally openair-passage, a Y

fuelsupply nozzle projecting into said passage, a swinging dampernormally operating to partially close that portion of the ailf:pas-.sage at" said nozzle but leaving1 said nozzle open at all times saiddamper being adapted to move and increase the size of said passageproportioned to an increased volume of air. traversing said passage, andmeans for retardn ing the returwmovement of the @lampe-rf 15. ln anatomizer for internal-combustion engines, the combi nation with amixingchamber having air and fuel inlet openings and a valve normallyrestricting the How of air Intestimonywhereoflhavesignedl myname`through said chamber, and adapted to open to this specification in thepresence of two subby atmospheric pressure, of means for retardscribingwitnesses.

ing the movement' of said valve comprising a A RALPH SHIPMAN. 5 cylindercontgining a. liquid and a piston con- Witncssesz necd to saidvalve andoperating in said cyl- J. K. MCWILLIAMS,

inder. C. W. CLEMENT.

